Parametric resonance and spin-charge separation in 1D fermionic systems

We show that the periodic modulation of the Hamiltonian parameters for 1D correlated fermionic systems can be used to parametrically amplify their bosonic collective modes. Treating the problem within the Luttinger liquid picture, we show how charge and spin density waves with different momenta are simultaneously amplified. We discuss the implementation of our predictions for cold atoms in 1D modulated optical lattices, showing that the fermionic momentum distribution directly provides a clear signature of spin-charge separation.Comment: 6 pages, 3 figures, published versio

Hiding in Plain Language: A Solution to the Pandemic Riddle of a Suspended Grand Jury, an Expiring Statute of Limitations, and the Fifth Amendment

Under the statute of limitations applicable to most federal crimes, 18 U.S.C. § 3282(a), “no person shall be prosecuted, tried, or punished for any offense, not capital, unless the indictment is found or the information is instituted within five years next after such offense shall have been committed.” That long-standing, generally uncontroversial procedural statute was thrust into the spotlight in 2020, when courts, prosecutors, and criminal defendants confronted an unprecedented and extraordinary scenario. In response to the COVID-19 pandemic, many federal district courts suspended grand juries to prevent the spread of the highly contagious life-threatening virus through group congregation. Indeed, to combat the rampant and unabating COVID-19 outbreak in Florida, the District Court for the Southern District of Florida suspended grand juries from March 26, 2020, until November 17, 2020, creating a nearly eight-month period during which prosecutors could not obtain indictments. But, under the Fifth Amendment to the United States Constitution, criminal defendants have the right to be prosecuted by indictment. Thus, during the grand jury suspension, the five-year statute of limitations applicable to most federal crimes was expiring on uncharged criminal conduct that ended in 2015 at a time when prosecutors could not comply with the Fifth Amendment. Despite being alerted of this constitutional issue, Congress did not enact legislation giving either the Chief Judge of the United States Supreme Court or the Chief Judges of the United States District Courts authority to suspend statutes of limitations during national emergencies, such as the COVID-19 pandemic, that affect the functioning of the courts. The combination of that judicial decision to suspend grand juries and that legislative decision not to suspend statutes of limitations posed a pandemic riddle: how can prosecutors comply with both the statutes of limitations and the Fifth Amendment when there are no grand juries? This Article examines the text of 18 U.S.C. § 3282(a), Federal Rule of Criminal Procedure 48(a), and 18 U.S.C. §§ 3288 and 3289; the purposes of statutes of limitations and the Fifth Amendment right to prosecution by indictment; and the related legislative history. Based on that examination, this Article suggests that, for most federal crimes, when defendants assert their Fifth Amendment right to prosecution by indictment during a pandemic (or other national emergency) that suspended grand juries and the statute of limitations on their alleged crimes is expiring, prosecutors can uphold that constitutional right and that statutory privilege as well as the public interest in seeing lawbreakers brought to justice by: (1) filing an information to toll the statute of limitations under 18 U.S.C. § 3282(a); (2) dismissing that information without prejudice under Federal Rule of Criminal Procedure 48(a) if the defendant does not waive his right to prosecution by indictment; and (3) obtaining a timely indictment within six months of the resumption of grand juries under the savings clauses in 18 U.S.C. §§ 3288 and 3289 for re-prosecutions after the dismissal of a timely filed information. This Article concludes that there already is a mechanism in the federal statute of limitations appliable to most federal crimes that allows prosecutors to constitutionally preserve criminal charges when a national emergency prevents grand juries from finding indictments

Perlindungan Hukum terhadap Rekam Medis Pasien di Rumah Sakit

Patient as consumers of health service have rights one of the rights is the state of the patients health is being concealed forever including medical data and medical records. Regarding to that, hospital as the health care provider obliged to provide legal protection to all kind of information in the medical record to the possibility of loss of information, data falsification or used by the undue. Based on that, the problem to be studied is: how is the medical record management in the hospital? And how is the medical record legal protection, which is given by the hospital? This study use normative legal research with statue approach. All of the legal resources based on library research and supported by primary and secondary legal material. Legal research analysis technique in this study use descriptive technique. The study result showed that the medical record management in the hospital have to based on health minister regulation 269/MENKES/PER/III/2008 about medical records. The management of medical record started from the time patient came to the hospital with record all action that given to the patient until all the treatment completed. The data and information on the medical record, hospital has an obligation of giving legal protection about the confidentiality based on Articles 10 health minister regulation 269/MENKES/PER/III/2008 with form of preventive and repressive protection

Supporting the active learning of collaborative database browsing techniques

We describe the implications of a study of database browsing behaviour for the development of a system to support more effective browsing. In particular we consider the importance of collaborative working, both in learning browsing skills and in co‐operating on a shared information‐retrieval task. From our study, we believe that an interface to support collaboration should promote the awareness of the activities of others, better visualization of the information data structures being browsed, and effective communication of the browsing process

A platform for P2P agent-based collaborative applications

The operational environment can be a valuable source of information about the behavior of software applications and their usage context. Although a single instance of an application has limited evidence of the range of the possible behaviors and situations that might be experienced in the field, the collective knowledge composed by the evidence gathered by the many instances of a same application running in several diverse user environments (eg, a browser) might be an invaluable source of information. This information can be exploited by applications able to autonomously analyze how they behave in the field and adjust their behavior accordingly. Augmenting applications with the capability to collaborate and directly share information about their behavior is challenging because it requires the definition of a fully decentralized and dependable networked infrastructure whose nodes are the user machines. The nodes of the infrastructure must be collaborative, to share information, and autonomous, to exploit the available information to change their behavior, for instance, to better accommodate the needs of the users to prevent known problems. This paper describes the initial results that we obtained with the design and the development of an infrastructure that can enable the execution of collaborative scenarios in a fully decentralized way. Our idea is to combine the agent-based paradigm, which is well suited to design collaborative and autonomous nodes, and the peer-to-peer paradigm, which is well suited to design distributed and dynamic network infrastructures. To demonstrate our idea, we augmented the popular JADE agent-based platform with a software layer that supports both the creation of a fully decentralized peer-to-peer network of JADE platforms and the execution of services within that network, thus enabling JADE multiagent systems (MASs) to behave as peer-to-peer networks. The resulting platform can be used to study the design of collaborative applications running in the field

A framework for P2P application development

Although Peer-to-Peer (P2P) computing has become increasingly popular over recent years, there still exist only a very small number of application domains that have exploited it on a large scale. This can be attributed to a number of reasons including the rapid evolution of P2P technologies, coupled with their often-complex nature. This paper describes an implemented abstraction framework that seeks to aid developers in building P2P applications. A selection of example P2P applications that have been developed using this framework are also presented

Temperature-dependent resistivity of suspended graphene

In this paper we investigate the electron-phonon contribution to the resistivity of suspended single layer graphene. In-plane as well as flexural phonons are addressed in different temperature regimes. We focus on the intrinsic electron-phonon coupling due to the interaction of electrons with elastic deformations in the graphene membrane. The competition between screened deformation potential vs fictitious gauge field coupling is discussed, together with the role of tension in the suspended flake. In the absence of tension, flexural phonons dominate the phonon contribution to the resistivity at any temperature $T$ with a $T^{5/2}_{}$ and $T^{2}_{}$ dependence at low and high temperatures, respectively. Sample-specific tension suppresses the contribution due to flexural phonons, yielding a linear temperature dependence due to in-plane modes. We compare our results with recent experiments.Comment: 11 pages, 3 figure

Macroscopic fluctuations theory of aerogel dynamics

We consider the thermodynamic potential describing the macroscopic fluctuation of the current and local energy of a general class of Hamiltonian models including aerogels. We argue that this potential is neither analytic nor strictly convex, a property that should be expected in general but missing from models studied in the literature. This opens the possibility of describing in terms of a thermodynamic potential non-equilibrium phase transitions in a concrete physical context. This special behaviour of the thermodynamic potential is caused by the fact that the energy current is carried by particles which may have arbitrary low speed with sufficiently large probability.Comment: final versio

Global trade statistics lack granularity to inform traceability and management of diverse and high-value fishes

Illegal, unreported and unregulated (IUU) fishing and seafood supply chain fraud are multifaceted problems that demand multifaceted solutions. Here, we investigate the extent to which global fisheries trade data analyses can support effective seafood traceability and promote sustainable seafood markets using one of the world’s most highly prized, yet misunderstood, groups of fishes as a model: the snappers, family Lutjanidae. By collating and comparing production, import and export data from international and national statistical collections for the period 2006–2013, we show that official trade data severely lack the level of detail required to track snapper trade flows, uncover potential IUU activities and/or inform exploitation management of snappers and related species. Moreover, we contend that the lack of taxonomic granularity and use of vague generic names in trade records represent one of the most insidious impediments to seafood traceability, and suggest that widely used harmonised commodity classification systems should evolve to address these gaps